Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0549604330c163d…

MALICIOUS

PDF

19.1 KB
MD5: 65775bc86370a7e80246516846dfff40 SHA-1: de055755144f23c2bc30021ca6a084a7bf36b983 SHA-256: b0549604330c163d5a352729cb9182a1b95fe5e7fb2f962704e255ae2296032e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1553.005 Mark-of-the-Web Bypass

The PDF file was detected as malicious by ClamAV with the signature Pdf.Exploit.Dropped-78. Static analysis revealed an embedded script payload within a PDF stream, indicating an attempt to execute malicious code. The presence of an embedded file further supports the payload delivery mechanism. The exact nature of the exploit is unclear due to the lack of script content, but the overall pattern suggests a malicious PDF designed to drop and execute a secondary payload.

Heuristics 5

  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
106e353517ad8791991ca109fd3a495d558a16199546dcfa879c87560cb8e5f5
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18798 bytes